Rpfef...the other VPI thread that you posted to, listed the Herbie's Big Tall Extra-Firm Tenderfeet for use on the HW-19 tables.
Here is the LINK
I have never tried these, but they are listed as replacements for the VPI in the ad on the link above.
Here is the LINK
I have never tried these, but they are listed as replacements for the VPI in the ad on the link above.